Consider the following assembly language program ORG 101C ST

Consider the following assembly language program. ORG $101C STARS EQU $1A SKY RMB2 ORG $0014 JUPITOR FCB $A1, $94, $21 FCC \'DE\' MARS FDB $24, $32A1 ORG $C002 LDAB #$1B STAB SKY INCB LDAA SKY ADDA #STARS ABA SKYWALK STAA SKY+1 JMP SKYWALK END After executing the above program, find the following values:

Solution

Here MARS is pointing to memory location where value is stored using FDB instruction.So MARS pointing to first 2 bytes.

		Description
[MARS]	$24	Here MARS is pointing to memory location where value is stored using FDB instruction.So MARS pointing to first 2 bytes.
JUPITOR	$0014	Since text segmented originated at memory location $0014 and JUPITOR assign to location allocated by FCB
SKY	$101C	SKY variable pointing reserved 2 bytes memory starting at $101C
ACCB	$1C	Accumulator B
[001A]	$32	From the instruction FDB assigned to MARS.
[SKYWALK]	$31	SKYWALK pointing to SKY+1 which assigned the content of accumulator A
[JUPITOR+2]	$21	JUPITOR pointing to memory location 0014.JUPITOR+2=0016 so it returns the content of 0016 location.
[C006]	0	C006 memory location not assigned any value in above program so it contains 0 value or garbage value.
#STARS	$1A	STARTS is equivalent symbol for value $1A
[101D]	$1B	101D is memory location pointed by SKY